pgsql-server/src/backend/access/nbtree nbtsearch.c

pgsql-server/src/backend/access/nbtree nbtsearch.c

CVSROOT:	/cvsroot
Module name:	pgsql-server
Changes by:	tgl@svr1.postgresql.org	03/07/29 19:18:39

Modified files:
	src/backend/access/nbtree: nbtsearch.c 

Log message:
	Fix longstanding error in _bt_search(): should moveright at top of loop not
	bottom.  Otherwise we fail to moveright when the root page was split while
	we were "in flight" to it.  This is not a significant problem when the root
	is above the leaf level, but if the root was also a leaf (ie, a single-page
	index just got split) we may return the wrong leaf page to the caller,
	resulting in failure to find a key that is in fact present.  Bug has existed
	at least since 7.1, probably forever.